SEM morphologies of wearing surface showed that wear behaviour of new Al Sn Si alloys is mainly metallic wear, and that of Al Sn alloy consists of metallic and fatigue wear.

• 磨损面的SEM分析表明：新型铝锡硅合金的磨损行为主要是磨粒磨损，而不含硅的Al?20Sn两相合金则为磨粒磨损及疲劳磨损。